Answer
$\frac{4}{i}$ = -4i
Work Step by Step
Directions: Write each quotient in the for a+bi.
$\frac{4}{i}$
$\frac{4}{i}$ ⋅ $\frac{i}{i}$
Multiply by i in numerator and denominator to get i out of denominator
$\frac{4i}{-1}$
Denominator simplifies to -1, since (i=$\sqrt -1$), and ($\sqrt -1$⋅$\sqrt -1$=-1)
-4i
Divide by -1 to get final answer.